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Your fuel trims are very positive, that will add fuel at WOT, IAT's seem high, my config has them at 140*f in spots. Better post more details of your setup.
Start with the basics like spark plugs. Look for a whiskered plug from being rich or too cold a plug. It can cause random misfires.
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Another 1 of 371 '12 T3 LS3 M6's built.
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